/usr/include/telepathy-1.0/telepathy-glib/_gen/ is in libtelepathy-glib-dev 0.24.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/telepathy-1.0/telepathy-glib/_gen/error-str.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/genums.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/gtypes.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/telepathy-enums.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/telepathy-interfaces.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-account-manager.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-account.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-call-content-media-description.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-call-content.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-call-stream-endpoint.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-call-stream.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-channel-dispatch-operation.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-channel-dispatcher.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-channel-request.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-channel.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-client.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-connection-manager.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-connection.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-dbus-daemon.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-debug.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-generic.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-media-session-handler.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-media-stream-handler.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-protocol.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-cli-tls-cert.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-account-manager.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-account.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-call-content-media-description.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-call-content.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-call-stream-endpoint.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-call-stream.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-channel-dispatch-operation.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-channel-dispatcher.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-channel-request.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-channel.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-client.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-connection-manager.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-connection.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-debug.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-generic.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-media-session-handler.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-media-stream-handler.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-protocol.h
/usr/include/telepathy-1.0/telepathy-glib/_gen/tp-svc-tls-cert.h